Method of burning refuse.



J. A. FRIED. METHOD or BURNING REFUSE.

APPLICATION FILED APR. 29, 1910.

Patented June 24, 1913.

INVENTOR Patented June 24, 1913.

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W W/ ii? J. A. FRIED. METHOD OF BURNING REFUSE. 4 APPLICATION nun APK.29;1910. 1,065,516.

f I r I I I J. A. FRIED. METHOD OF BURNING REFUSE.

APPLIOATION TILED APR. 29. 1910 Patented June- 24, 1913.

INVENTOR "ST T-as 3.51

Jonan'n ALQYS FRIED, or B'A'RMEN, GERMANY; 7 I

METHOD or B'URNF-NG .musn.

. To'izll 'wlwmit "mag concern: I

Be it known that I, 'Jol-ianx- Anoys Fnnao, of 'Barmen, in the Empire of Germany, have invented a certain new and useful Improvement in Methods of Burning Refuse, of

whichthe following is} afull, clear, and

exact description, referencefbeinghad to the accompanying drawings, forming part otthis specification, in whieh- Figure "1' is a longitudinal sectionof a v.f'urnace arranged for carrying out. my .process; Fig..2.-is a" horizontal section on the irregular line II'I I- of Fig. l; and Fig. 3

is a vertical cross section on the line IIIIII of Fig, 2. .Fig. tie a transverse section throughthe foregrate.

My invention .relates' to the destruction of garbage or refuse, particularly that from citiesand villages.

The burning of garbage should, as far as 'pos sible,- meet' the following requirements:

The refuse should be-k consumed. withoutodor and smoke, and atafhigh temperature to kill an *erms. I The heat'of combustion of; the garliage should .befutilized" to the highest extent... The process should pro iduce .as large a proportionas possible 'of slag or cinder, and as little as-possibleof i fine ashes, and the spaeerequired to carry out the process should be reduced to the v .minimii-m .to' reduce the cost of the plant and the operating expenses.

' In carrying out my process, I 'make use of the fact that, when the temperatureof combustiori of the garbage is above 'a\critical point-about 1000 C.under a restricted primary air supply to the garbage grate,

the, carbon. of the fuel is burned to carbon inonoxid rather than carbon dioxid, and

that when this carbon monoxid is mixed with secondary snpdaly of heated air, it will burn to carbon ioxid, giving a very complete combustion with a minimum air supply. y

In carrying out my invention, I feed. the garbage proper to a series of cells or furnaces, which dlscha'rgelnto a common nnxmg passage for the gases, each cell having two gi'atcs,-a 1 nain or primary grate on which the garbage is dumped, and a foregrate n )on which the slagged or cindered inatcria formed under the high heat of the main grate are drawn forward and uti- Specification of Lettersiatent. Application filed April 29,1910. Serial-No. 558,4;59.

the secondary .air supply" been raised to the critical point. 'In'the preferred form of my apparatus, the grates are trough shaped, the main gratehaving terraced or ste ed ,sides with lateral .air openings in the vertically. extending pon tions of the steps, both grates being made hollow or jacketed andconneeted with s,

pressure blower. The air ispreferably. circulated around partitions or walls in the jacket to give a tortuouscourse to the air and ta kc'up as much heat as possible and also keep the grates cool. I The air openings in the maingrates are preferably arranged in a series of superimposed rows, opening inwardly, and extending downwardlto'the solid bottom. In the foregrate, the air openings are preferably arranged along the top portion of the sides =to jdischarge' "the' air upon and throughtlie clinker." In. this way, the air'is heatedin'the foregrate not. 2 only within thejacket but by. direct contact.

with the clinker or nianer d is 'cha .g'."

of the air thereon, this ighly. heated air then flowing back to unite with ,theQCO large through the sides of this. grate, and as the temperature rises to the critical point, the slag in formihg will close up the'lower rows of air openings, thus reducing the air supply at the time when less air is' desired to form CO under the'high temperature In this way, I can burn the garbage th r a minimum supplyof air and at a high temperature, the products of combustion ":being largely CO, to which the necessary oagygen is supplied'by the secondary heated air passing through the foregrate.

In the use of my lnventionjwith most- 8O rising from the garbage and cornfplet ely' v burn the same toCO *In thefirststageof burning. the garbage deposited on' the main grate, the air supply-isl 'rel a-tively forms of refuse or garbage, relatively hom'ogcneous slag is produced which may be" 1 v drawn forward from the foregrate after its temperature. is reducedgandcan be utihzedin place ofgravel or sand for making concrete or can be moldedinto bricks or used for other commercial puigvoses. The amount of slag produced in re use burners depends upon thefurnaee tempetature, and

. port 7 into the setting 8 of afverticalsteam 'l .boiler" 9. Division walls; =10 extend" up- 'wardly along the sidesof this boiler,.-and

show a preferred form .of a paratus for carrying my invention into e ect, 2.repre sents a series of cells or'furnacesarranged in a row and each having a rear discharge .port- ,8, leading into a common mixingfchamber 4,

, extending across the setting in the rear of the garbage furnaces or cells, '1 have shown this'iiiixing chamber as connected by a nap rowv-ertical slot or port S-Y vith combustion chamber 6, which at 'its-rearopens'through the combustion: gasesrising above it and above these sidewallsdeseend through the fire tubes, as'shown in Fig. 1, into the chamber 11, from which they pass downivardly gases contact to sup'erheatthe steam colleet-' to the outlet flue.

12 indicates .a' supe'rheater with which the e'd from the boiler.

-.'The top of each'cellor furnace is pr'hadded with a hopper oropening 13, Whichmay be controlled by..any1 suitable valve mechanism, arranged to dum the garbage at any desired intertals and inany desired amounts-upon the main grate l4. This main grate is'of trough forin, as shown in Fig. 3, having in the form shown an outer metallic casing 15, an intermediatebattle 16, and an inner trough shaped casing or grate proper 17. The grateproper isipro lvided wyith terraced-or-stepped sides having rows offlinlet openings, 18 in the vertically extending portioiisofthe steps; at. different levels. The jacket'formed between the'two'casings is connected by a valv e controlled pipe 20,

with an air blast pipe 21, the valreactuating device being indicated at '22. -This main grate preferably extends to 'thefront wall v preferably in theiippen portio 23 of the lfurnacel or c'ell'ya-n'd registers with theforeg rate 24, which is also preferably of trough shape aud similarto .the "fore! grate, except thatthe sides needrnot'beyten raced, and the; air inlet openin so that the main portion o f the inner trough casing is solid to" hold-.the'slag or cinder.

Fromthil, forcgrat'e the-slag may be.,pulled out throu gh a front :opening26, -\vh ich be c'on trolled by any suitab'le jdoor.- 'Thej foi'egl'ate jacket is connected fvalve pipe I 27, with the 'air blast pipe-:21, to vhich' air under pressure maybe supplied through any the main grate of onc'cell to have been suitable connections;

in carrying out the process", a'ssuiiimg plant to l lWll operat on and the refuse the foregrate of t plya relatively large amount of air.

The bottoin 19 is p'i'eferably-solid;

g cinder,

cell is drawn out through the front andthe highly heated slag matethe slag on the rial "on the ma'in grate isdrawn forwardupon the fbregrate. A charge of garbage is then dropped upon the main grate of this 1 cell, and it being ignited by the hot slag of the foregrate, begins to burn. In the first stage, considerable CO will be generated, and the air blast to: the main grate will sup- This air fiowingin laterallywill not tend-to blow .up the loose dust of the charge; but. is: forc d vinto its side portions, the garbage packing downinto the trough shaped ,grate.-' As the temperature rises, "larger 'fllilOllXlts of CO willbe generated, the temperature rapidly ncreasing. As the" tompei'atu1'e rises above about 1000? the secondary. heated air I from above the foregrate is started or in'-. creased, this uniting with the" C0 of the main grate to burn very completely and give a high heat, Under this high temperature andc'omplete combustion .the garbage .or,

refi'ise materials will begin to. slagpand this slag will tend to close some of theair holes in the main grate, and thus reduce the pri-.-

inary .air. I hand or. automatically, since it is des rable to lCStl'lQbtllQ 'amount of air as the. tempera-- ture rises, .in' order to, produce a .la'rge' amount of CO. The supply of secondary air is kept up; until the garbage is burned in the. cell,-'wl 1ei'i the hot slagof the toregrhte in this cell- 1S drawin out and the This air may also be reduced by 1,3. slagged or cindered garbagethrowii forward u'ponthe foregrateto'talie its turn in heating the air, when the secondary airis next rumba; on in this cell. ilreterably the Charging of the successive cells is arranged to take place at different times, so that \i hcn fresh garbage is dumped into one cell or fun,

iiac'c, the-garbage in another cell-*or cells is, 7'

partiallyconsumed and is under a high heat'. Thus, the highly heated gases from-one'cell,

i it

will mix'ii ith' and aid in the combustion of 1 the gases flowing from the fl'6Slily"Cl1algQd The .cliarging apparatus is preferably such lllltt the opeiiii'ig' issealed after the charge (if-garbagehas been; dumped into the;

ace or eell.

that in duinpin charge in any "one" celh the blast of through the primary grate is, started" andthis blast is-gra'duallvreducedas the term,

heated a ir'blast is supplied through the fore.

grate, thus giving the requisite amount of oxygen at, a high tei'npcra'tuic to combine .peraturezris'es'x After the ctemperatflriei has. risen to a desirable point'rTrwhereconsider able CO ".is' being formed, the secondary;

' with the increasingamounts htCO'frmn vthe main grate. The a r blast may be ir turiied ott'while the slag s removed from 130 1 v of Phage ia being (L310?) KM. 15; supplied above a, second charge HItQIPORQU T10 (111% managed of my inwnthm win be in'tho first rammed chamber and which is iu 2v *iizzmd mt H hu u $herem muivr slshbilanta-aliy the 92mm This high 111 112 in T M (20501 Mm mum hex-Pin (91w u m the said mm? in UN aim re muggg I i'irwt manned svppurimg;

Mum c:

inn? 5: 21

I PPOIQ Jywia i of: Hm ali y 'm a H1115! a (11100 CO during the major portion of the porting surface to the supplementary supopemtion, also supplying" air under pressure porting surface, substantially as described. IQ through a supplenu-ntary mppurting sur- In testimony whereof, I have hereunto set face into Contact with heated material drawn my hand 5 thereon from the main supporting surface, JUHANN ALOYS FRIED. hi.

feeding saidheated air in burn the CO to Witnesses: CO. and intermittently movii the heated OTTO KNIG,

1 n i ,5 v v portions of the material from the main sup WALTER VONNEGUT. 

